Carbon brush



G. KLEIN CARBON BRUSH Dec. 6, 1932.

Fiied May 17, 1932 2- Sheets-Sheet l Inventor ,fl o ye Khan,

1 By 2mm k flllomey Dec. 6, I932.

2 Sheets-Sheet 2 Patented Dec. 6, 1932 PATENT OFFICE GEORGE KLEIN, 0F CENTRALIA, ILLINOIS CARBON BRUSH Application filed May 17,

This invention relates to new and useful improvements in electric brushes, and more particularly to a novel brush for use with commutators on electric machines of various types.

An importantobject of the invention is to provide a brush wherein a connection is provided and adapted to maintain a uniform How of current over the surface of the brush carbon.

Still another important object of the invention is to provide a carbon brush to which the usual conductor is secured in a firmly contacting manner.

These and other important objects and advantages of the invention will become apparent to the reader of the following specification.

In the drawings Figure 1 represents a fragmentary detailed sectional view of the carbon brush and conductor.

Fig. 2 represents a side elevational View of the novel brush.

F 3 represents a sectional View taken substantially on line 3-3 of Fig. 1.

Fig. i represents a fragmentary detailed sectional View similar to Fig. 1 but showing only one conductor connection.

Fig. 5 represents a perspective view of the cap.

Fig. 6 represents a side elevational View of the bolt and countersink nut.

Referring to the drawings wherein like numerals designate like parts, it can be seen that such numeral. 5 represents the carbon block which is provided with a transversely extending threaded bore 6. The outer end of the block 5 has an opening through which the legs 7 of the conductor are disposed and trained into the bore 6 as in the manner substantially shown in Fig. 1.

The outer ends of the conductor legs 7 are connected to the clip or connector 9. The outer end of the block 5 is provided with a 1932. Serial No. 611,903.

sheet metal cap 10 of U-shape, the leg portions of which are provided with countersunk openings 11 in which the head of the screw 8 and the nut 8 engage, the cap 0bviously serving to prevent rupture of the block by the screw.

Fig. 4: discloses a slightly modified construction wherein only a single conductor is used and extends through substantially the entire length of the bore, the construction being otherwise identical with that of Fig. 1.

While the foregoing specification sets forth the invention in specification terms, it is to be understood that numerous changes in the shape, size and materials may be resorted to without departing from the spirit and scope of the invention as claimed hereinafter.

Having thus described my invention, what I claim as new is:

1. A brush of the character described comprising a carbon block having a transversely extending bore therein, a conductor disposed through the bore, said bore being provided with threads in the wall thereof, and a screw feedable into the bore longitudinally of the conductor for clamping the conductor against the wall of the bore.

2. A brush of the character described comprising a carbon block provided with a transverse bore, the wall of the bore being provided with ribs, a conductor extending into the bore, and a screw threaded into the bore and against the conductor to bind the conductor against the said ribs.

3. A. brush of the character described comprising a carbon block provided with a transverse bore having thereads therein, a conductor disposed through the bore, and a screw threaded inwardly of the bore and between the wall of the bore and the conductor to drive 85 the conductor into the threads of the wall.

4. A brush of the character described comprising a carbon block having a bore therethrough, a conductor disposed through the bore, a U-shaped cap disposed over one end of the block and provided with openings in the leg portions thereof registering with the bore, and a screw disposed in the bore for maintaining the said conductor urged snugly against the Wall of the bore, said screw extending through the openings in the leg portions of the cap.

In testimony whereofl affix my signature.

GEORGE KLEIN. 

